Great write up. I'm sure the LS460 is a quiet car. A couple of years ago I sat in the backseat of a 1994 LS and boy was that car quiet. When the car wasn't moving you could even think the engine wasn't turned on at all. Another car which is dead quiet at ideal is myfirends 05 Golf 1.6, very suprising for such a cheap car.
Lexus LS 460 will be at an autoshow which will be taking place here in gothenburg between the 10-12th November and I have also been told tht Lexus will be offering test drives at the show. Hopefully I will be able to get a ride or the LS 460.